Automatic dampening water replenisher

An automatic dampening water replenisher for an offset printing press comprising:

• a first tank for storing a stock solution;
• a second tank for storing dampening water;
• a pump for transferring said stock solution from said first tank to said second tank;
• a first flow rate sensor for measuring a flow rate of said stock solution being fed from said first tank to said second tank by said pump;
• a second flow rate sensor for measuring a flow rate of diluent water being supplied to said second tank;
• a solenoid valve for controlling a flow of said diluent water into said second tank of dampening water;
• first and second level sensors for respectively detecting a level of said stock solution in said first tank and a level of said dampening water in said second tank;
• and
• a control means, responsive to outputs of said first and second flow rate sensors and said first and second level sensors, for controlling a feed rate of said stock solution pump and an input flow of said diluent water through said solenoid valve so that the concentration of said dampening water in said second tank is maintained within a predetermined range.